PPV as a support for firefighting in subways
Positive pressure ventilation (PPV) fans are widely used by the fire service during firefighting operations in buildings. Fans are positioned to create a flow through the enclosure. This flow can remove the smoke after the fire or affect the direction…
Making the attack positive

Positive Pressure Attack (PPA) is a useful tactic to have for structural firefighting. Before we get into the discussion of the when and how to use PPA we should make sure we have a clear definition of what PPA is.…

PPV – Saving lives in the US for more than 40 years

Positive pressure ventilation is now the mainstay of firefighting departments across the US. As with many innovations, it grew out of a strong firefighting culture in California, a state known for its extensive experience fighting wildfires. Historically, mechanical ventilation was…

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